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Iodine
Iodine is an essential trace element in the human body. It is required for the formation of the thyroid hormones- thyroid stimulating hormone (TSH) and thyroxine. It is also important for healthy metabolism, growth, and development. In particular, iodine is important for the health of pregnant women and the development of their unborn children.
Iodine is naturally found in many food sources including fish and dairy products. In addition, many countries also put iodine in their table salt to ensure people receive enough of this important mineral.
The daily recommended intake of iodine is 150 μg/day. For expectant mothers, the recommended intake is slightly higher at 220-250 μg/day. People who are at risk of iodine deficiency include those who live in iodine-deficient areas, pregnant women, breastfeeding mothers, and those who have thyroid problems.
Iodine deficiency can lead to a number of health problems including goiter, an enlargement of the thyroid gland, which is usually caused by a lack of iodine. It can also lead to hypothyroidism, which is a condition where the thyroid does not produce enough of the hormones needed for normal functioning.
Iodine is easily absorbed in the body, with about 70 to 90 percent of dietary iodine being absorbed in the small intestine. The remainder is absorbed in the large intestine.
Selenium
Selenium is an essential trace mineral required for the proper functioning of many of the body’s enzymes. It is a powerful antioxidant, helping to protect cells from damage. Selenium also has a protective effect on the heart, and may help to reduce the risk of stroke and other forms of cardiovascular disease.
Selenium is naturally found in many food sources, but the levels vary depending on the soil in which they grow. Brazil nuts, fish and seafood, meats, eggs, and some cereals are good sources of selenium.
The daily recommended intake of selenium is 55μg/day. In some cases, those with a deficiency in this important mineral may benefit from taking a supplement.
Selenium is easily absorbed in the body and around 50 to 55 percent of dietary selenium is absorbed in the small intestine. The remainder is absorbed in the large intestine.
Zinc
Zinc is an essential trace element found in all of the body’s cells and tissues. It is involved in many biological processes important for a healthy body, such as cell growth, immune system functioning, and wound healing.
Zinc is naturally found in many food sources, such as beef, pork, poultry, legumes, seeds, nuts, and whole grains.
The recommended daily intake of zinc is 11 mg/day. People at risk of zinc deficiency include those with poor diets, vegetarians and vegans, pregnant and breastfeeding women, the elderly, and those with certain medical conditions.
Zinc is easily absorbed in the body. About 30 to 40 percent of dietary zinc is absorbed in the small intestine, while the remainder is absorbed in the large intestine.